Core tip



Dec. 6, 1927. 1,651,705

5. M. HILL CORE TIP.

Filed Feb. 5. 1927 HIHI- INVENTOB ATTOENE Y.

mi QMQQ Patented Dec 6, 1927."

LINE

EARL ivr. HILL, Wisconsin RAPIDS, Wisconsin, 'assrenon r0 eonsonrna'rnn" warns rowan a earns COMPANY, or 'WISCONSIN RAPIDS, WISCONSIN, a con- PORATION 0F WISCONSIN.

CORE TIP.

' Application filed February 5, 1927. Serial No. 166,261.

The invention relates to core tips for the winding cores of rolls of'paper, such as commonly used in newspaper printing;

Numerous efforts have been made to protect the ends of the tubular winding core, which is usually formed of paper rolled and pasted together. Metal tips have been sug gested for this purpose having the keyway formed therein in various manners to avoid the wearing of the core by the'engagement of the driving dog or key therewith during both the winding and unwinding operations. The cores are used repeatedly and protection of this sort is essential. Protection must also be afforded against the spreading of the ends of the tubular core by the use of pry bars inserted therein for moving the very heavy roll of paper wound thereon, and such protecting tip should be devoid of shoulders on the'inside that might be engaged by a shaft or bar passing through the core, and devoid of shoulders on the outside so as not to interfereavith the paper wound on the core. In most instances the metal core tips have required the paper core to be materially weakened by having its ends trimmed to receive the metal tip and by reason of openings formed therein to take rivets, screws and the like. i i

It is an object of the present invention to avoid the weakening of the core in this manner by providing a substantial core tip with flaring flanges capable of being forced onto the slightly reduced end of the core and compressing the core material between them to effect a tight joint making other fastening means unnecessary and sufficiently embedding the flanges in the core material to cause them to lie substantially flush with the inner and outer surfaces of the core.

Another object of the invention is to provide a sheet metalcore tip wherein the keyway is formed with clean-cut edges to preventjamming of the dog or keytherein,

which would. render the core valueless for.

further use after the dog was forced out of its wedging engagement with the tip.

A further objectof the invention is to form such keyway with rounded ends to avoid fracture of the metal at these regions,

in elai Referring to the accompanying drawings 1 inwhich like characters ofrefcrence indicate the same parts in different views.

Fig/1 is an end view of a" core tip constructed in accordance with this invention;

Fig. 2 is a sectional View thereof in place on the end of a core tube;

'Fig. 3 is a similar sectional view on a plane at right angles to 2; and

Fig. l line ie-4 of Fig. 3. v r

In these drawings, 10 indicates the usual core tube having its slightly reduced end compressed between the inner and outer conthe sectional plane of Fig.

centric annular flanges 11 and 12 of the core tip, which are joined by the ring 18. The ring and flanges-are integral, being preferably formed up from a disk of cold rolled steel in a manner that is well known in the art. 7

is a sectional View on the' plane of. Y

The distance between the parallel flanges I i 11 and 12 is somewhat less than the thick- 1 ness of the core tube and the edges of said flanges are formed flaring so as to compress the core tube material between them when I the core tip is forced thereon under pressure. The strength of the core tube material is thus not. reduced at the, junction with the core tip, and still, by reason of the .flanges terminating in knife edges 14, they core tip is cut away at the inner flange 11 and. the connecting ring 13 to form the key seat opening IG-registering with the notch 15. The ends of the key seat opening 16 are smoothly rounded as indicated in Fig.1 and 3, thereby distributing the driving stresses evenly along theend regions to avoid fracture of the metal such as has been experienced in other core tips having cut keyways. The edges of the key seat opening form abutments receiving the driving key' or dog, thereby1 simplifying 'manufacturein dispensing wit inturned edges, and provid ing a clean=cut opening for the key which avoids the jammia, iines' experienced with core tips employing pressed keyWays.

The metal core tip completely filled with the compressed core material is not likely to be expanded or distorted by the centering cone fitting therein. he core tips of this invention are capable of inexpensive manufacture and When installed on the tubular core provide long service Without the development of defects common to other devices of this character.

What I claim as new and desire to secure by Letters Patent is:

L A metal core tip for core tubes, comprising a ring having inner and outer concentric integral flanges to receive the end of a core tube between them, there .being an opening cut in the ring and inner flange to form'a key seat, both ends of the opening being rounded to effect the distribution of driving stresses in the material, and the cut edges of the tip material forming abutments for a driving key.

2. A metal core tip for core tubes, comprising a ring having inner and outer concentric integral flanges to receive the end of a core tube between them, there being an opening cut in the. inner flange and ring and terminating in said ring at a distance from the outer flange, the cut edges of the tip material forming .abutments for the driving key and the ends of said opening being rounded to efiect the distribution of driving stresses in the material.

In testimony whereof, I aflix'my signature. r

EARL M; HILL. 

